Match the following
List-I (Alloying element in steel)
A. Lead
B. Aluminium
C. Copper
D. Phosphorus
List-II (Effect)
1. Restricts grain growth
2. Raise yield point
3. Reduces strength to impact
4. Free machining
Codes:
A B C D
(a) 1 2 3 4
(b) 2 3 4 1
(c) 3 4 1 2
(d) 4 1 2 3